Answer :

[tex]1h=60min\to1min=\frac{1}{60}h\\\\\\345\ ft/min=345\ \frac{ft}{\frac{1}{60}h}=345\times60\ ft/h=20,700\ ft/h[/tex]

the rate given is 345 ft/min

this means within 1 min distance is - 345 ft

we have to convert this speed to ft/h

1 hour is equivalent to 60 minutes

so if 60 minutes equals 1 hour

1 minute is equal to - 1/60 hr

so the distance within 1 minute is - 345 ft

since 1 min = 1/60 hr

distance within 1/60 hour = 345 ft

therefore distance in 1 hour = [tex] \frac{345}{1/60} = 345 * 60 = 20 700 ft [/tex]

answer is 20 700 ft/h

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